<header id="page-header" class="site-header">
  {% include navigation-main.html %}
  {% if page.obsolete == true %}
  <div class="alert alert-warning">
    <h4 class="text-center">
      Some of the content of this page might be out of date.
    </h4>
  </div>
  {% endif %}
</header>
{% if site.show_banner %} {% include banner.html %} {% endif %}
